Spark arrester



Nov. 26, 1929. G. CARPENTER SPARK ARRESTER Filed April 22, 1924 R O T NE v W ATTORNEYS Patented Nov. 26, 1929 UNITED STATES GUY CARPENTER,OFsNEW Y'ORK, IN.";Y.

SPARK ARRESTER Application filed April 22,

My invention relates to the art of producing devices adapted to arrest,cool and collect, the solid substances accompanying the gases in theproducts of combustionparticularly as applied to locomotive engines and,to a large extent, follows the principle and some of the structuralelements disclosed and illustrated in my prior applications for patentnumbers 693,185 and 693,-

0 186, filed February 16, 1924-. However, this invention differs fromthe aforesaid inventions in that the. spiral I employ is located in adifferent posit-ion (with relation to the fire box and smoke stack) andthe smoke chamber itself is subdivided in a different manner, and

the stack is near the forward end thereof,

and in addition to these changes I provide means to direct all theproducts of combustion into a spiral passage immediately as they leavethe fire box.

My invention may be more easily understood by reference to theaccompanying drawing, which illustrates a preferred form ofconstruction, and in which,

Fig. 1 shows a longitudinal sectional view of the forward part of alocomotive engine fitted with my device, and

Fig. 2 shows a transverse sectional View taken on the line 22, in Fig.1.

Reference now being had to the drawings forming a part of thisapplication the numeral 10 indicates the fire tubes of a locomotiveengine, the numeral 11 the smoke chamber, 12 the smoke stack and 13 theexhaust jet, all of which (except for the arrangement as hereinillustrated) are more or less customary in the ordinary type oflocomotive engine now in common use.

In the smoke chamber I have placed a transverse partition 14, locatedslightly to the rear of the smoke stack 12, which partition has a largecircular opening in its central portion, and a cylinder 15 fits withinthis opening and extends rearwardly from the partition 14 to a pointnear the fire tubes 10. A cone-shaped member 16 extends from the innerend of the cylinder 15 rearwardly and outwardly to engagement with theinner wall of the smokechamber 11. Within the cylinder 15 I have secureda second longitudinal 1924. "'Seria1 ?No."708,149.

cylindersbeingof substantially the same length and -disposed witlrrelation' to each other as shown. Ahelically formed member 18-is secured tothisinner supporting member 17, its blade contacting and fitting flushagainst the inner surface of the outer cylinder 15. If a cylinder isused for this support ing member 17, one or both of its ends are closed,the only function of the said supporting member being to support thehelically formed member 18. 0n the inner surface of the outer cylinder15 I have secured a number of baffles 19 which, preferably, are somounted V as to oppose the flow of the gases, and adjacent each of thesebafll'es I have provided an opening 20 through the wall of the saidcylinder 15.

By the construction shown and described it is obvious I have created achamber be-" tween the inner surface of the smoke box 11 and the outercylinder 15, which chamber is closed at its forward end by the partition14 and at its rear end by the cone-shaped member 16, and this chamber Idesignate as my collecting chamber and indicate it by the numeral 21.The openings 20 through the Wall of the cylinder 15, open into thischamger 21, and I have provided a door 22, at its ase.

The jet 13 is, obviously, positioned centrally beneath the open end ofthe smoke stack 12, and in close proximity thereto.

In practical operation the jet 13 draws the products of combustion fromthe fire box' at a very high velocity. They pass through the coneshapedmember 16 into the cylinder 15, where they are forced around thehelically formed member 18. This action pro; duces a strong centrifugalforce upon the particles of solids, such as sparks, cinders and thelike, in the products of combustion and they are, as a result, thrownoutwardly against the inner surface of the cylinder 15, caught by thebaffles 19 and pass through the openings 20 into the collecting chamber21, and may be removed therefrom by opening the door 22. The gasesproceed on their way through the spiral passage formed by the helicallyformed member 18 and the cyl inder 15 and into the stack chamber, andare expelled through the stack 12.

Having thus described my invention What I claim and desire to secure byLetters Patent of the United States, is:

In a spark arrester for locomotive engines employing a fire chamber; asmoke chamber; a transverse partition, provided with a central opening,mounted in the smoke chamber; a smoke stack; a cylinder fitted in theopening of the partition and extending rear- Wardly therefrom, therebeing openings in the Wall of said cylinder; a helically formed memberfitted in said cylinder; baflles secured to the inner Wall of saidcylinder, a battle being adjacent each of the openings in the Wall ofthe cylinder and an exhaust jet in the smoke chamber positioned belowthe smoke stack.

GUY CARPENTER.

